Friction spring draft-rigging for railway-cars.



PATENTED FEB. 14, 1905.

P. MOORE. FRICTION SPRING DRAFT RIGGING FOR RAILWAY CARS.

APPLICATION FILED SEPT.B, 1904.

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. P. N. MOORE. FRICTION SPRING DRAFT RIGGING FOR RAILWAY CARS.

APPLICATION FILED SEPTJJ, 1904.

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PETER N. MOORE, OF MILWAUKEE, W ISOONSIN.

FRICTION SPRING DRAFT-RIGGING FOR RAILWAY-CARS.

SPECIFICATION forming part of Letters Patent No. 782,789, dated February14, 1905,

Application filed September 8, 1904. Serial No. 223,715.

To all whom, it may concern:

Be it known that 1, PETER N. MOORE, a citi- Zen of the United States,residing in Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented anew and useful improvement in Friction SpringDraft-Rigging for Railway-Oars, of which the following is aspecification.

My invention relates to improvements in friction spring draft-riggingfor railway-cars.

The object of my invention is to provide a friction spring draft-riggingof a simple, strong, efiicient, and durable construction composed of fewparts and adapted to exert a high frictional resistance in connectionwith a direct-acting spring resistance longitudinally arranged in theline of draft.

My invention consists in the means 1 cmploy to practically accomplishthis object or resultthat is to say, it consists, in connection with thedraw-bar, stop-castings, followers, and a longitudinally-arrangedspring, of a sliding friction-shell having an internal friction-surface,two sets of sliding friction-blocks having external friction-surfaces insliding frictional engagement with the internal friction-surface of thefriction-shell and also interengaginglongitudinal friction sides, sothat the longitudinal movement of one set of friction-blocks in respectto the other set produces an additional frictional resistance to thatproduced between the friction-shell and friction-blocks, one set offriction-blocks abutting at one end against one follower and the otherset of friction-blocks bearing at their opposite end against one end ofthe longitudinally-arranged spring, each friction-block being providedwith double inclines and a floating double-cone or double-faced spreaderengaging the double inclines on the two sets of friction-blocks, so thatthe movement of the draw-bar in either direction under pulling orbuffing strains will cause the segmental friction-blocks to be outwardlyspread against the friction-shell as the friction-blocks andfriction-shell are moved longitudinally in respect to each other.

My invention also consists in the novel construction of parts anddevices and in the novel combinations of parts and devices herein shownor described.

In the accompanying drawings, forming a part of this specification,Figure 1 is a central longitudinal vertical section of a friction springdraft-rigging embodying my invention. Fig. 2 is a horizontal section.Fig. 3 is a partial cross-section on line 3 3 of Fig. 2. Fig. 4 is'arear end view of the friction-blocks. Fig 5 is a detail view showing oneof the friction-blocks of one set, and Fig. 6 is a similar view showingone of the friction-blocks of the other set.

In the drawings, A represents the draft-timbers or center sills of thecar; A, the front or cross sill; O, the coupler; B, the draw-bar, and Bthe draw-bar extension, the same being represented as in the form of astrap or yoke secured to the draw bar by bolts or rivets b.

D D are the side plates or stop-castings, the same having front and rearstops (Z (Z for the followers E E to abut against and upper and lowerguides (Z (Z for the followers to reciprocate in or between, the upperguide (Z being preferably integral with the side plates or stop-castingsD, and the lower guide (Z being preferably in the form of a removableplate secured in place by bolts (Z' to permit the insertion and removalof the removable parts of the draft-rigging.

F is a longitudinally-arranged spring directly behind the draw-bar andin the line of draft, there being also, preferably, a small spring fnesting within it.

G is the sliding friction-shell, having an internal friction-surface g.The friction-shell G is preferably of cylindrical form and provided withfeet or projections g to rest and slide upon the lower guides (Z of theside plates or stop-castings D. The friction-shell G is also provided atits rear end with an internal shoulder or flange which engages theshoulder or flange lb of the seat-block H, against which the rear end ofthe spring F abuts and which is interposed between the spring and therear follower E to cause the sliding friction-shell G to be returned toits normal position when the spring F expands. The seatblock H alsopermits a limited initial compression of the spring F under both pullingand buffing strains, and thus adapts the apparatus to more efticientl ycushion light strains.

M and M are two sets of segmental friction-blocks, each having anexternal frictionsurface m in sliding frictional engagement with thefriction-shell G and each also having interengaging longitudinalfriction sides m m, adapted to produce an additional frictionalresistance by the longitudinal sliding movement of one of the sets offriction-blocks M in respect to the other set of friction-blocks, M. Theforward set of friction-blocks M bears against the front follower E, andthe other set of friction-blocks, M, bears against the spring F. Theforward set of sliding friction-blocks M, which are engaged by orreceive the thrust or pressure of the front follower, are also providedwith projecting wings or shoulders m adapted to engage the front ends mof the other set of friction-blocks, M, and thus cause both sets offriction-blocks to act or move in unison in respect to thefriction-shell G after a limited movement of one set of friction-blockshas occurred in respect to the other set of friction-blocks. Each of thefriction-blocks M M is also provided with a shoulder m at its rear endto bear against or receive the pressure of the spring F. The spring Fthus bears equally against. all the frictionblocks M M after a limitedmovement of one set of friction-blocks has occurred in respect to theother set of friction-blocks. Each of the friction-blocks M M is alsoprovided with double or oppositely-inclined spreader-faces m m, whichare engaged by the floating double-cone or double-incline faced spreaderN. The floating double-acting spreader N, which is preferably ofdouble-cone form, is supported by and between the two sets offriction-blocks M M, and when either set of blocks M or M is movedlongitudinally by or with the drawbar the floating spreader operates toforce all the segmental bloc s M M into close frictional engagement withthe surrounding friction-shell G and also to force two sets offriction-blocks into close frictional engagement with each other, thusproducing a powerful frictional resistance.

The operation is as follows: Under buffing strains or blows the rearfollower is held stationary by engagement with the rear stops on thestop-castings, and the front follower moves with the draw-bar, and thuscauses the frietion-blocks M M and friction-shell to move rearwardlywith the draw-bar during the initial compression of the spring F untilthe rear end of the friction-shell G engages the rear follower E, whenthe further rearward movement of the draw-bar causes the friction-blocksM M to frictionally slide in respect to the friction-shell G, which isnow held stationary. The longitudinally-sliding movement of thesegmental friction-blocks M in respect to the other set offriction-blocks, M, also adds to the frictional resistance. In pulling,the operation is the same, but the reverse, the front follower being nowheld stationary and the rear follower moving with the draw-bar, and thuscausing the initial compression of the spring F first to take place andthen the friction-shell G to move forward with the drawbarafter its rearend is engaged by the rear follower.

I clain 1. In a friction spring draft-rigging, the combination with thedraw-bar,drawbar strap or extension, stop-castings, followers and alongitudinally arranged spring, of a sliding friction-shell having aninternal friction-surface, two sets of segmental sliding frictionblockshaving external friction-surfaces in sliding frictional engagement withthe internal friction-surface of said friction-shell and provided withinterengaging longitudinal friction sides, each of said friction-blockshaving double inclines, and a floating double-incline-face spreaderengaging the double inclines on the two sets of friction-blocks, one setof said friction-blocks bearing against the spring, and the otheragainst one of the followers to cause the floating spreader to force thetwo sets of.

2. In a friction spring draft-rigging, the

combination with the draw-bar, draw-bar extension, stop-castings,followers and a longitudinally-arranged spring,of aslidingfrictionshell,two sets of independently-movable segmental sliding f riction-blockseach having doudle-incline spreader-faces, and a double-incline floatingspreader, substantially as specified.

3. In a friction spring draft-rigging, the combination with thedraw-bar, draw-bar extension, stop-castings, followers and alongitudinally-arranged spring, of a sliding friction-shell, two sets ofindependently-movable segmental sliding friction-blocks each havingdouble-incline spreaderrfaces, and a doubleincline floating spreader,and a seat-block interposed between one end of the spring and one of thefollowers, substantially as specified.

4. In a friction spring draftrigging, the combination with the draw-bar,draw-bar extension, stop-eastings, followers and alongitudinally-arranged spring, of a sliding friction-shell, two sets ofindependently-movable segmental sliding friction-blocks each havingdouble-incline spreader-faces, and a doubleincline floating spreader,and a seat-block interposed between one end of the spring and one of thefollowers, said friction-shell having a flange or shoulder engaging saidseat-block, substantially as specified.

5. In a friction spring draft-rigging, the combination with a draw-bar,draw-bar extension, a pair of followers and a longitudinallyarrangedspring, of a sliding friction-shell, sliding segmental friction-blocksinside the shell and a double-incline floating spreader engaging theinclines on the friction-blocks to force the same into frictionalengagement with said shell, substantially as specified.

6. In a friction spring draft-rigging, the combination with a draw-bar,draw-bar extension, a pair of followers and a longitudinallyarrangedspring, of a sliding friction-shell, sliding segmental friction-blocksinside the shell and a double-incline floating spreader engaging theinclines on the friction-blocks to force the same into frictionalengagement with said shell, a seat-block interposed between one end ofthe spring and one of the followers, and provided with a shoulderengaging a shoulder on 1said friction-shell, substantially as specifiec.

7. In a friction spring draft-rigging, the

